python3.pkgs.inkex: init from inkscape

This is useful for testing Inkscape extensions.

pkgs/development/python-modules/inkex/default.nix

@@ -0,0 +1,41 @@
+{ buildPythonPackage
+, inkscape
+, lxml
+, python
+}:
+
+buildPythonPackage {
+  pname = "inkex";
+  inherit (inkscape) version;
+
+  format = "other";
+
+  propagatedBuildInputs = [
+    lxml
+  ];
+
+  # We just copy the files.
+  dontUnpack = true;
+  dontBuild = true;
+
+  # No tests installed.
+  doCheck = false;
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p "$out/${python.sitePackages}"
+    cp -r "${inkscape}/share/inkscape/extensions/inkex" "$out/${python.sitePackages}"
+
+    runHook postInstall
+  '';
+
+  meta = inkscape.meta // {
+    description = "Inkscape Extensions Library";
+    longDescription = ''
+      This module provides support for inkscape extensions, it includes support for opening svg files and processing them.
+
+      Standalone, it is especially useful for running tests for Inkscape extensions.
+    '';
+  };
+}

pkgs/top-level/python-packages.nix

@@ -3493,6 +3493,8 @@ in {
 
   injector = callPackage ../development/python-modules/injector { };
 
+  inkex = callPackage ../development/python-modules/inkex { };
+
   inotify-simple = callPackage ../development/python-modules/inotify-simple { };
 
   inquirer = callPackage ../development/python-modules/inquirer { };